/**
 * libpsd - Photoshop file formats (*.psd) decode library
 * Copyright (C) 2004-2007 Graphest Software.
 *
 * libpsd is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: gradient_fill.c, created by Patrick in 2006.06.11, libpsd@graphest.com Exp $
 */

#include "libpsd.h"
#include "psd_system.h"
#include "psd_stream.h"
#include "psd_descriptor.h"


// Gradient fill setting (Photoshop 6.0)
psd_status psd_get_layer_gradient_fill(psd_context * context, psd_layer_record * layer)
{
    psd_layer_gradient_fill * data;
    psd_int length;
    psd_int number_items;
    psd_uint type, key, rootkey;
    psd_uchar keychar[256];
    
    layer->layer_info_type[layer->layer_info_count] = psd_layer_info_type_gradient_fill;
    layer->layer_type = psd_layer_type_gradient_fill;

    data = (psd_layer_gradient_fill *)psd_malloc(sizeof(psd_layer_gradient_fill));
    if(data == NULL)
        return psd_status_malloc_failed;
    memset(data, 0, sizeof(psd_layer_gradient_fill));
    layer->layer_info_data[layer->layer_info_count] = (psd_uint)data;
    layer->layer_info_count ++;

    // default value
    data->scale = 100;
    data->reverse = psd_false;
    data->dithered = psd_false;
    data->align_with_layer = psd_true;

    // Version ( = 16 for Photoshop 6.0)
    if(psd_stream_get_int(context) != 16)
        return psd_status_gradient_fill_unsupport_version;

    // Unicode string: name from classID
    length = psd_stream_get_int(context) * 2;
    psd_stream_get_null(context, length);

    // classID: 4 bytes (length), followed either by string or (if length is zero) 4-
    // byte classID
    length = psd_stream_get_int(context);
    if(length == 0)
        data->id = psd_stream_get_int(context);
    else
        psd_stream_get_null(context, length);

    // Number of items in descriptor
    number_items = psd_stream_get_int(context);

    /***************************************************************************/
    while(number_items--)
    {
        length = psd_stream_get_int(context);
        psd_assert(length == 0);
        if(length == 0)
            rootkey = psd_stream_get_int(context);
        else
        {
            rootkey = 0;
            psd_stream_get(context, keychar, length);
            keychar[length] = 0;
        }
        // Type: OSType key
        type = psd_stream_get_int(context);

        switch(rootkey)
        {
            case 'Dthr':    // dithered
                // boolean
                psd_assert(type == 'bool');
                data->dithered = psd_stream_get_bool(context);
                break;

            case 'Rvrs':    // reverse
                // boolean
                psd_assert(type == 'bool');
                data->reverse = psd_stream_get_bool(context);
                break;

            case 'Algn':    // align with layer
                // boolean
                psd_assert(type == 'bool');
                data->align_with_layer = psd_stream_get_bool(context);
                break;
                
            case 'Angl':    // angle
                // Unit psd_float
                psd_assert(type == 'UntF');
                
                // '#Ang' = angle: base degrees
                key = psd_stream_get_int(context);
                psd_assert(key == '#Ang');

                // Actual value (double)
                data->angle = psd_stream_get_double(context);
                break;

            case 'Scl ':    // scale
                // Unit psd_float
                psd_assert(type == 'UntF');

                // '#Prc' = percent:
                key = psd_stream_get_int(context);
                psd_assert(key == '#Prc');
                                
                // Actual value (double)
                data->scale = (psd_int)psd_stream_get_double(context);
                break;

            case 'Type':    // gradient style
                // Enumerated
                psd_assert(type == 'enum');

                // TypeID: 4 bytes (length), followed either by string or (if length is zero) 4-
                // byte typeID
                length = psd_stream_get_int(context);
                psd_assert(length == 0);
                key = psd_stream_get_int(context);
                // Gradient Type
                psd_assert(key == 'GrdT');
                data->style = psd_stream_get_object_gradient_style(context);
                break;

            case 'Grad':    // grid minor
                // Descriptor
                psd_assert(type == 'Objc');
                psd_stream_get_object_gradient_color(&data->gradient_color, context);
                break;

            default:
                psd_assert(0);
                psd_stream_get_object_null(type, context);
                break;
        }
    }

    return psd_status_done;
}

